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Sealing rubber sleeve of low-temperature soluble bridge plug and preparation method of sealing rubber sleeve

A technology of sealant and bridge plug, which is applied to the sealant cartridge of low-temperature soluble bridge plug and its preparation field, can solve the problems of insoluble, soluble bridge plug needing improvement, and high dissolution temperature, and achieves good assembly performance and low-temperature dissolution performance. , Good assembly, simple operation steps

Active Publication Date: 2021-12-17
深圳市智远隆材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The soluble seals currently on the market generally have a high dissolution temperature in water, and it is impossible to achieve almost complete dissolution in low temperature water
[0003] Therefore, the current technology related to soluble bridge plugs still needs to be improved

Method used

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  • Sealing rubber sleeve of low-temperature soluble bridge plug and preparation method of sealing rubber sleeve
  • Sealing rubber sleeve of low-temperature soluble bridge plug and preparation method of sealing rubber sleeve
  • Sealing rubber sleeve of low-temperature soluble bridge plug and preparation method of sealing rubber sleeve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Mix the raw materials except water, and inject the obtained raw material mixture to obtain the rubber body, and then place the rubber body in an environment of 10-40 degrees Celsius and 30-100% humidity to absorb water for a predetermined time , to obtain a rubber cartridge, and the contents of each component in the obtained rubber cartridge are shown in Table 1.

[0069] Wherein, the degree of polymerization of the PVA resin is 2400, and the degree of alcoholysis is 98%; PVA resin / plasticizer=0.94:1; the acid-binding agent is sodium carbonate, and the filler is calcium carbonate.

Embodiment 2-16

[0071] Mix the raw materials except water, and inject the obtained raw material mixture to obtain the rubber body, and then place the rubber body in an environment of 10-40 degrees Celsius and 30-100% humidity to absorb water for a predetermined time , to obtain a rubber cartridge, and the contents of each component in the obtained rubber cartridge are shown in Table 1.

[0072] Wherein, the degree of polymerization of the PVA resin is 2400, and the degree of alcoholysis is 98%; the PVA resin / plasticizer is shown in Table 1; the acid-binding agent is sodium carbonate, and the filler is calcium carbonate.

Embodiment 17

[0074] Mix the raw materials except water, and inject the obtained raw material mixture to obtain the rubber body, and then place the rubber body in an environment of 10-40 degrees Celsius and 30-100% humidity to absorb water for a predetermined time , to obtain a rubber cartridge, and the contents of each component in the obtained rubber cartridge are shown in Table 1.

[0075] Wherein, the degree of polymerization of the PVA resin is 1200, and the degree of alcoholysis is 98%; PVA resin / plasticizer=0.94:1; the acid-binding agent is sodium carbonate, and the filler is calcium carbonate.

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Abstract

The invention discloses a sealing rubber sleeve of a low-temperature soluble bridge plug and a preparation method of the sealing rubber sleeve, and relates to the technical field of oil and gas well sealing equipment. According to the sealing rubber sleeve, polyvinyl alcohol resin, a plasticizer, an acid-binding agent and a filler are compounded, and the synergistic interaction effect is achieved by adjusting the components and the proportion, so that the obtained sealing rubber sleeve is low in melting point and easy to form and process, the mechanical properties such as hardness and strength of the sealing rubber sleeve meet the use requirements of oil and gas well sealing, and the pressure-bearing sealing performance, the assembling performance and the low-temperature dissolving performance are good. The sealing rubber sleeve of the low-temperature soluble bridge plug provided by the invention can be specifically prepared into a sealing rubber sleeve, and the sealing rubber sleeve is used as a bridge plug accessory of an oil and gas well and has good assembling performance and ideal pressure-bearing sealing performance with other components so as to effectively seal the oil and gas well. When the oil-gas well needs to be dredged, the sealing rubber sleeve can be rapidly dissolved in water under the low-temperature condition, and the use requirements of oil-gas well sealing equipment are well met.

Description

technical field [0001] The invention relates to the technical field of oil and gas well sealing equipment, in particular to a low-temperature soluble bridge plug sealing rubber cartridge and a preparation method thereof. Background technique [0002] Bridge plug is a kind of equipment used for sealing layer in oil and gas wells. It has the characteristics of less construction procedures, short cycle time and accurate sealing position. Therefore, it has been widely used in the fields of oil production and maintenance of oil and gas wells. In the actual production operation, the oil and gas wells are blocked by bridge plugs. After a period of time, the bridge plugs dissolve and the full-bore unblocking is realized, and the man-hours and operating costs are greatly reduced. As a part of the bridge plug, the rubber cartridge is required to meet the plugging requirements in the downhole environment, and then it can be almost completely dissolved in water. The soluble seals curre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K3/26C08K5/17C08K5/3432C08K5/19C08K3/22C08K3/34C08K3/04C08K5/053C08K5/103C08K5/12C08K5/13
CPCC08K3/26C08K5/17C08K5/3432C08K5/19C08K3/22C08K3/34C08K3/04C08K5/053C08K5/103C08K5/12C08K5/13C08K2003/265C08K2003/2224C08K2003/2206C08L29/04Y02W90/10
Inventor 卢敏娟
Owner 深圳市智远隆材料科技有限公司
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